@WoenK
I'm charging on AC now. The light keeps going out but when I unplug and reconnect the usb cable, the light comes back on. I've done this twice now but I'm not keeping tabs on how long it takes till the light goes out. When I see the light out, I just disconnect and reconnect again. I'll keep doing this for a while longer.

@knc1
Thanks, that makes sense. The offset in the partition x the block size (512) matches.